Webster
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Webster’s Revised Unabridged Dictionary · 1913

Must

Must (mŭst), v. i. or auxiliary. [OE. moste, a pret. generally meaning, could, was free to, pres. mot, moot, AS. mōste, pret. mōt, pres.; akin to D. moetan to be obliged, OS. mōtan to be free, to be obliged, OHG. muozan, G. müssen to be obliged, Sw. måste must, Goth. gamōtan to have place, have room, to able; of unknown origin.] 1. To be obliged; to be necessitated; - - expressing either physical or moral necessity; as, a man must eat for nourishment; we must submit to the laws.

2. To be morally required; to be necessary or essential to a certain quality, character, end, or result; as, he must reconsider the matter; he must have been insane.

Likewise must the deacons be grave. 1 Tim. iii. 8.

Morover, he [a bishop] must have a good report of them which are without. 1 Tim. iii. 7.

☞ The principal verb, if easily supplied by the mind, was formerly often omitted when must was used; as, I must away. "I must to Coventry." Shak.

Must, n. [AS. must, fr. L. mustum (sc. vinum), from mustus young, new, fresh. Cf. Mustard.] 1. The expressed juice of the grape, or other fruit, before fermentation. "These men ben full of must." Wyclif (Acts ii. 13. ).

No fermenting must fills . . . the deep vats. Longfellow.

2. [Cf. Musty.] Mustiness.

Must, v. t. & i. To make musty; to become musty.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.